Mathematics

# an entrepreneur estimates that the total profit from his proposed company will be given p(x)=x^3-4x^2+3x-12. where p is I'm hundreds of dollars and x is the number of years elapsed after the company starts operations. in how many years (x) will the company break even (No profit,No loss)?

$x^3-4x^2+3x-12>0\\ x^2(x-4)+3(x-4)>0\\ (x^2+3)(x-4)>0\\ x>4\\$